Parrocchetti mascherati in gabbia a Berkeley, California

(AP Photo/Jeff Chiu)

In this May 20, 2010 photo, cherry-headed conures are shown at the home of Malcolm Raff in Berkeley, Calif. The wild parrots that call San Francisco home have become a given of city life, squawking their way to their favorite spots, delighting tourists. The famous flock is now about 300 strong, more than triple what it was 10 years ago.